Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2019	Aug. 09, 2019
Document And Entity Information
Entity Registrant Name	RELIABILITY INC
Entity Central Index Key	0000034285
Document Type	10-Q
Document Period End Date	Jun. 30, 2019
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Is Entity an Emerging Growth Company?	false
Is Entity a Small Business?	true
Is Entity's Reporting Status Current?	Yes
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		16,914,693
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2019
:Entity Incorporation State Country Code	TX